4GamerGear AKRACING AK-5050 Ergonomic Series Racing Gaming Office Executive Chair Black/Blue Edition Metal Construction - Thanks to the metal frame, the chair is extremely safe and strong. Adjustable armrests, tilt, height and back Headrest and Lumbar Support Pillow included Adjustable Back Angle: 180-degree backrest adjustment allows you to adjust it to your needs. Metal base with class 4 gas lift support up to 396 lbs